<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <!--        登陆的表单-->
        <el-form
          class="login_form"
          :model="loginForm"
          :rules="rules"
          ref="loginForms"
        >
          <h1>{{ $t('login.welcome') }}</h1>
          <h2>{{ $t('login.hello') }}</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              v-model="loginForm.username"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              :prefix-icon="Lock"
              type="password"
              v-model="loginForm.password"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              :loading="loading"
              class="login_btn"
              type="primary"
              size="default"
              @click="login"
            >
              {{ $t('login.loginButton') }}
            </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
    <div class="menu">
      <div @click="changeLang('en')">English</div>
      <div @click="changeLang('zh')">中文</div>
    </div>
  </div>
</template>
<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { computed, reactive, ref } from 'vue'
// 引入用户相关的小仓库
import useUserStore from '@/store/modules/user.ts'
import { useRoute, useRouter } from 'vue-router'
import { ElNotification } from 'element-plus'
// 引入获取当前时间的函数
import { getTime } from '@/utils/time.ts'
import { useI18n } from 'vue-i18n'
const { locale } = useI18n()

const changeLang = (lang: string) => {
  locale.value = lang
  localStorage.setItem('lang', lang)
}

// 获取el-form组件
let loginForms = ref()
let useStore = useUserStore()
// 获取路由器
let $router = useRouter()
// 获取路由对象
let $route = useRoute()
// 定义变量控制按钮
let loading = ref(false)
// 收集账号和密码数据
let loginForm = reactive({ username: 'admin', password: '111111' })
const login = async () => {
  // 保证全部表单校验通过再发请求
  await loginForms.value.validate()
  // 加载效果:开始加载
  loading.value = true
  // 点击登陆按钮后干什么？
  // 通知仓库发登陆请求
  // 请求成功-》首页展示数据的地方
  // 请求失败-》弹出登陆失败的信息
  try {
    // 保证登陆成功
    await useStore.userLogin(loginForm)
    // 编程式导航跳转到展示数据首页
    // 判断登陆的时候，路由路径中是否有query参数，如果有就往query参数跳转,没有就跳转首页
    let redirect: any = $route.query.redirect
    $router.push({ path: redirect || '/' })
    // 登陆成功提示信息
    ElNotification({
      type: 'success',
      message: '登陆成功欢迎回来',
      title: `Hi~ o(*￣▽￣*)ブ，${getTime()}好`,
    })
    // 登陆成功加载效果消失
    loading.value = false
  } catch (error) {
    // 登陆失败加载效果消失
    loading.value = false
    // 登陆失败的提示信息
    ElNotification({
      type: 'error',
      message: (error as Error).message,
    })
  }
}
// 自定义校验规则函数
const validatorUserName = (_rule: any, value: any, callback: any) => {
  // rule:校验规则对象
  // value：表单元素文本内容
  // callback: 如果符合条件callBack放行通过，不符合条件注入错误提示信息给callBack
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度大于5位'))
  }
}
const validatorPassword = (_rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('mima长度大于6位'))
  }
}
// 定义表单校验需要配置对象
const rules = {
  // 规则对象属性：require，代表这个字段务必要校验
  // min
  // max
  // message
  // trigger
  username: [
    // { required: true, min: 6, max: 10, message: '账号长度6-10位', trigger: 'change' }
    { trigger: 'change', validator: validatorUserName },
  ],
  password: [
    // { required: true, min: 6, max: 15, message: '账号长度6-15位', trigger: 'change' }
    { trigger: 'change', validator: validatorPassword },
  ],
}
// 国际化
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;
}

.login_form {
  position: relative;
  width: 80%;
  top: 30vh;
  background: url('@/assets/images/login_form.png') no-repeat;
  background-size: cover;
  padding: 40px;
}

h1 {
  color: white;
  font-size: 40px;
}

h2 {
  font-size: 20px;
  color: white;
  margin: 20px 0px;
}

.login_btn {
  width: 100%;
}
</style>
